From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 6 Dec 2016 21:53:48 +0000 (+0200)
Subject: Compute Framebuffer size correctly when texture mipmaps are attached
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=42c783eb553949aae85d5f5b5ea9d0d9776780e1;p=libs%2Fgl.git

Compute Framebuffer size correctly when texture mipmaps are attached
---

diff --git a/source/framebuffer.cpp b/source/framebuffer.cpp
index 638a710f..a3197f59 100644
--- a/source/framebuffer.cpp
+++ b/source/framebuffer.cpp
@@ -168,12 +168,12 @@ void Framebuffer::check_size()
 			else if(i->type==GL_TEXTURE_2D)
 			{
 				Texture2D *tex = static_cast<Texture2D *>(i->tex);
-				width = tex->get_width();
-				height = tex->get_height();
+				width = max(tex->get_width()>>i->level, 1U);
+				height = max(tex->get_height()>>i->level, 1U);
 			}
 			else if(i->type==GL_TEXTURE_CUBE_MAP)
 			{
-				width = static_cast<TextureCube *>(i->tex)->get_size();
+				width = max(static_cast<TextureCube *>(i->tex)->get_size()>>i->level, 1U);
 				height = width;
 			}
 			if(full_viewport)